CVE-2026-42971

Windows Push Notification Information Disclosure Vulnerability

State: Published
Severity: 5.5 Medium
Published: Jun 9, 2026
Updated: Sep 24, 2026
Reserved: Apr 30, 2026

Description

Exposure of sensitive information to an unauthorized actor in Windows Push Notifications allows an authorized attacker to disclose information locally.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Affected Products

Product	Versions
Windows 10 Version 1607Microsoft	10.0.14393.0 to before 10.0.14393.9234Affected
Windows 10 Version 1809Microsoft	10.0.17763.0 to before 10.0.17763.8880Affected
Windows 10 Version 21H2Microsoft	10.0.19044.0 to before 10.0.19044.7417Affected
Windows 10 Version 22H2Microsoft	10.0.19045.0 to before 10.0.19045.7417Affected
Windows 11 version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.7219Affected
Windows 11 Version 23H2Microsoft	10.0.22631.0 to before 10.0.22631.7219Affected
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.8655Affected
Windows 11 Version 25H2Microsoft	10.0.26200.0 to before 10.0.26200.8655Affected
Windows 11 version 26H1Microsoft	10.0.28000.0 to before 10.0.28000.2269Affected
Windows Server 2016Microsoft	10.0.14393.0 to before 10.0.14393.9234Affected
Windows Server 2016 (Server Core installation)Microsoft	10.0.14393.0 to before 10.0.14393.9234Affected
Windows Server 2019Microsoft	10.0.17763.0 to before 10.0.17763.8880Affected
Windows Server 2019 (Server Core installation)Microsoft	10.0.17763.0 to before 10.0.17763.8880Affected
Windows Server 2022Microsoft	10.0.20348.0 to before 10.0.20348.5256Affected
Windows Server 2025Microsoft	10.0.26100.0 to before 10.0.26100.32995Affected
Windows Server 2025 (Server Core installation)Microsoft	10.0.26100.0 to before 10.0.26100.32995Affected

References

Windows Push Notification Information Disclosure Vulnerabilityvendor-advisorypatch

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